Belt lacer



7, 1940- o. B. amass ET m. 2.199.932

BELT LACER Dec. 21, 1956 ZSheets-Sheet 1 INVENTORS 0 m, 3. 5/?1065 BY 5/600 4. Awnb y 7, 1940- o. B. BRIGGS ET AL 2.199.932

BELT LACER Filed Dec. 21, 1936 2 Sheets-Sheet 2 44 cc. ac

Patented May 7, 1940 EL BELT LACER Orville B. Briggs, Perrysburg, and Albert L.

Lamb, Toledo, Ohio,

assignors to Safety Belt 4. Lacer Company, Toledo, Ohio, a corporation of Delaware Application December 21, 1936, Serial No. 116,911 In Canada January 31, 1936 w 5 Claims.

This invention relates to portable belt lacers, and has as its object to provide an improved hand power unit for use in connection with a vise lacer such as that shown in our Patent No. 2,- 058,767, issued October 27, 1936, for applying constricting pressure to the jaws of such a lacer.

Another object is to provide a power unit that can be carried to the place of operation, such as,

I for example, at a line shaft where a belt has to be rep-aired, and which is adapted to rest in a position most convenient for the operator in making such a repair.

,Other objects will appear from a perusal of I the following detailed description of the invenl" tion in connection with the accompanying drawings, in which;

Fig. 1 is a side elevation, partly broken away, of the power unit assembled in operative relationship with a lacing unit,

Fig. 2 is a plan view of the same,

Fig. 3 is a detail view of an improvement in the lacing unit,

Fig. 4 is a central longitudinal view of the assembled units, and

Fig. 5 is a transverse sectional view of the power unit.

The lacing unit comprises generally a pair of hook seating jaws A carried by jaw supporting members B in the form of yokes, swingingly attached to a magazine C, centered by the combined centering and limiting mechanism D, and the supporting yokes are urged toward open position by springs E. More detailed description of the lacing unit may be obtained by referring to the patent above identified. The power developing unit comprises a cast iron frame 48 having integral side rails 49 terminating in a head region 56 and an integral leg 5|, of proper length to cause the unit to rest upon a level surface with the frame 48 at an angle of about 30. The head is recessed at 52 to receive the lacer unit. On each side of the recess 52 is a pair of cars 53 in which is mounted a fulcrum pin 54. Between each pair of ears 53 is disposed a rocker arm 55, fulcrumed upon a respective pin 54. Each rocker arm is roughly in the form of a letter H, comprising spaced furcations joined by web portions 55a. On. one side of the fulcrum, the furcations form a long lever arm, carrying a roller 56, and on the other side'of the fulcrum, they form a short lever arm, carrying a jaw 51.

Each jaw 51 is swingingly mounted on a pin 58 extending through ears formed integrally with the jaw and through the respective rocker arm 5 55, the ears being spaced to receive the rocker arm. A lever 60, formed integrally with each jaw- 51 midway between its ends, is received between the furcations of a respective arm 55 and pivoted thereto'by means of short pins 62. At their other ends, the links are pivoted by means of pins 63 between spaced cars 64 and 54a, the latter being formed integrally with the leg 5| and the ears 64a being formed at the upper end 01' a projection 56b extending upwardly from the times parallel to the head region of the frame 48, and the faces of the jaws are maintained parallel to each other.

A wedge 65 having integral wings 66 slidable in grooves 61 in the respective rails 49, is propelled between the rollers 56 by -a ratchet 68 having teeth 69 engageable with a dog l6 pivoted at H between ears 12 on the wedge. A shoulder 13 on the dog 16 engages the wedge 65 to support the dog normally inan outstanding position. The ratchet 68 is propelled by a crankshaft l4 journalled in the frame 48, the rear portion of the ratchet being journalled upon a crank pin 15 formed as an integral eccentric central region of thecrankshaft l4, and shown in dotted lines in Figs. 1 and 2. The crank shaft 14 may be oscillated by means of levers l6 fixed in the ends thereof. Movement of the levers l6 upwardly and forwardly will cause the ratchet to advance, and movement of the levers downwardly and rearwardly will cause the ratchet to recede. As it advances, the ratchet will force the wedge 65 between the rollers 56, spreading the rocker arms and moving the jaws 57 toward each other. The jaws 5'! in turn force the jaws A of the lacer to close the lacing hooks, as previously described.

As the ratchet 68 recedes, a follower ratchet 11, which during the advancing movement has dropped into a position roughly corresponding to that reached by the ratchet 66, will engage the dog 16 and hold the wedge in the position to 45 which it has been advanced. The follower ratchet TI is pivoted at 18 to the frame 48. During the receding movement, the ratchet 68 will be drawn back to a position in which its tooth that has been in engagement with the pawl 10 may become disengaged therefrom, whereupon the ratchet will drop slightly, bringing its next higher tooth into position to engage the pawl upon its next forward stroke.

The toothed edges of both ratchets are arranged spirally with reference to their axes of pivotal movement, whereby as they move downwardly their engaging teeth will be progressively farther from their axes.

When it is desired to allow the jaws to open, the pusher ratchet is moved forward slightly, until the. follower ratchet is relieved. The latter is then flipped back to an inoperative position. The pusher ratchet may then be pulled upwardly, and the dog ill will simply rotate around its pivot until it releases the ratchet, whereupon the latter will slide against the smooth back face of the dog until it has completely released thewedge and allowed the latter to recede to its-starting position.

A handle bail SE, pivoted to the ends of the upper pin 58, serves for carrying the device about.

Owing to the position of inclination of the machine, a most convenient access to the laws; is provided, and all working parts are properly elevated above the supporting surface.

The hook seating jaws A are pivoted upon the yokes B by means of screws 26. Movement of the jaws relative to the yokes is limited by means of pins 2? secured in the ends of the jaws and projecting through slots 28 arcuately disposed in the yokes B, concentric with the screws 26.

We claim:

1. In a belt lacing apparatus, a supporting frame, a pair of jaws carried by said frame and movable toward each other, and means for moving said jaws, comprising: an operating member slidably mounted in said frame, a crankshaft journalled in said frame, a pawl having one end pivoted on said operating member and its other end adapted to assume an operative position projecting toward said crankshaft in substantial alignment with the path of movement of said operating member, said pawl being adapted to normally seek said operative position and to be supported in said position by engagement with said operating member, a ratchet pivoted to said crankshaft and having a toothed peripheral region adapted to project toward said operating member into operative engagement with the projecting end of said pawl and to transmit thrust through said pawl to said operating member inresponseto oscillating movement ofisaid crankshaft, the teeth of said ratchet being arranged spirally with referenceto the ratchet pivot, the ratchet being arranged to swing about its pivot tosuccessively bring a more remote tooth into engagement with the pawl upon each oscillation of the crankshaft, whereby to advance said operating member step by step toward jaw closing position, and. means for holding the operating member in each successive position of advance, said pawl being adapted, by yielding away from itsvoperative position, to facilitate retraction of said ratchet to a position allowing the operating member to recede from. jaw closing position.

2. A belt lacing apparatus as defined inclaim 1', wherein the pawl is urged by gravity toward its operative position.

3. A belt lacer as defined in claim 1, wherein the ratchet is urged by gravity in the direction of advancement of the operating member toward jaw closing position.

4;. A belt lacer as defined in claim 1, wherein. the holding means is is the form of 'a gravity impelled ratchet having a toothed periphery of spiral contour for engaging the pawl.

5. A belt lacer as defined in claim 1', wherein a pair of levers are fulcrumed intermediate their ends on the frame and the operating member is in the form of a wedge adapted when advanced- 

